A human circulating immune cell landscape in aging and COVID-19
Yingfeng Zheng , Xiuxing Liu , Wenqing Le , Lihui Xie , He Li , Wen Wen , Si Wang , Shuai Ma , Zhaohao Huang , Jinguo Ye , Wen Shi , Yanxia Ye , Zunpeng Liu , Moshi Song , Weiqi Zhang , Jing-Dong J. Han , Juan Carlos Izpisua Belmonte , Chuanle Xiao , Jing Qu , Hongyang Wang , Guang-Hui Liu , Wenru Su
Protein Cell ›› 2020, Vol. 11 ›› Issue (10) : 740 -770.
A human circulating immune cell landscape in aging and COVID-19
Age-associated changes in immune cells have been linked to an increased risk for infection. However, a global and detailed characterization of the changes that human circulating immune cells undergo with age is lacking. Here, we combined scRNA-seq, mass cytometry and scATAC-seq to compare immune cell types in peripheral blood collected from young and old subjects and patients with COVID-19. We found that the immune cell landscape was reprogrammed with age and was characterized by T cell polarization from naive and memory cells to effector, cytotoxic, exhausted and regulatory cells, along with increased late natural killer cells, age-associated B cells, inflammatory monocytes and age-associated dendritic cells. In addition, the expression of genes, which were implicated in coronavirus susceptibility, was upregulated in a cell subtypespecific manner with age. Notably, COVID-19 promoted age-induced immune cell polarization and gene expression related to inflammation and cellular senescence. Therefore, these findings suggest that a dysregulated immune system and increased gene expression associated with SARS-CoV-2 susceptibility may at least partially account for COVID-19 vulnerability in the elderly.
aging / single-cell sequencing / blood / COVID-19 / immune cells
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The Author(s) 2020
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